Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b17fd0f580ababc…

MALICIOUS

PDF

85.1 KB Created: 2021-03-01 00:01:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 8a971e8fb8d39887fd59db8a237cfaf6 SHA-1: db0f469d779f666732d65e1bc96fa0a657f81493 SHA-256: 9b17fd0f580ababca86008f5e5399721d98461bc7fb8377d44fd77a70f44ac0b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs pointing to disposable domains, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or trojan delivery role.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yafferge.ru/award?keyword=how+to+use+homemade+projector+as+tv In PDF document text
    • http://bufo.online/what_starbucks_drink_does_not_have_coffeede6re.pdfIn PDF document text
    • http://resimpub.com/samsung_wf210anw_xaa_wont_drain0a1ji.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/5iggUja/puzzle_platformer_games_ps4.pdfIn PDF document text
    • http://xilexevu.scienceontheweb.net/52452144346.pdfIn PDF document text
    • http://gratoram.site/nail_art_spa_saint_petersburg_fle8sjw.pdfIn PDF document text
    • https://gunobapeve.weebly.com/uploads/1/3/4/7/134706327/3995430.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/rewrite_the_stars_piano_sheet_musicfsy0b.pdfIn PDF document text
    • http://vuvuga.xyz/loposaxemus97.pdfIn PDF document text
    • https://cdn.sqhk.co/bibunifez/0WYjfuY/the_sims_cheats_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/vapezuwe/TCie9ia/claw_machine_prize_ideas.pdfIn PDF document text
    • http://bikelumonekodex.mygamesonline.org/86306711682.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/nifowevunufobixo.pdfIn PDF document text
    • http://babbieshop.ru/3123869363719gwn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB81 5200 bytes
SHA-256: 0e3a4cb853f1ef1a543e02a5455866bd3aa646003e99a04b80fe428d9c81d67c
font_01_sfnt_off0000fd43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD43 11572 bytes
SHA-256: 5b32276be8b513aa39ea96d55ca1dc838a3c8cc627d722eccc61e4e1f03de6bb
font_02_sfnt_off000123ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123AE 16136 bytes
SHA-256: 4a82d930af4ff3021f3d19cbd37464c8e664c90bef13661c9db69df894853898
font_03_sfnt_off0001389d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1389D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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